perk van lith



(Model.) A

G. lVI. PERK VAN LITH.

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N. PETERS. Phamumognpw. waning n. c.

f UNITED STATES PATENT OFFICE.

GERARD M. PERK VAN LITH, OF NEW YORK, N. Y. l

PERSPECTIVE DELINEATOR.

SPECIFICATION forming part of Letters Patent No. 254,178, dated February2B, 1882.

Application led May 2, 1881. (Model.)

To all whom it may concern Be it known that I, GERARD M. PERK VAN LITH,of the city, county, and State of New York, have invented a new andImproved Per- 5 spective Delineator, of which the following is aspecification. t

The object of my invention is to furnish an apparatus by which accurateperspectivedrawings can be rapidly and conveniently made. 1o Iheinvention consists in an object-glass and an adjustable eye-piececombined for use as hereinafter described and claimed.

In the accompanying drawings, Figure 1 is a perspective view of theapparatus in the position of use, and Fig. 2 is aplan view of-the samein a closed position.

Similar letters of reference indicate corresponding parts. j

A is a box of suitable size, thecover of zo which consists of a glass,a, set in a frame, b, that ishinged to the box A. The .hinges willpreferably be fitted with stop-lugs that allow the cover to be opened toa right-angled position, as shown, but no farther, and a brace, g, z 5pivoted to the box, being then raised against the frame, the cover vissecurely held in position. c is a slide, fitted for 'vertical movementin a socket-piece, d, at the frontof the box,so that 3o it can beadjusted to the height desired. A

pin, screw, orother device will be used to secure the slide in place.

e is an eye-piece. The box A serves for holding paper, pencils, 5 andother articles, being a convenient reccptacle for that purpose. Thehoxis not, however, an essential. Neither is the construction exactlyasdescribed necessary for the Work. In use the box is'placed on a suitablestand or 4o support, with the cover raised, as shown, and

the eye-piece adjusted according to the distance of the object or lengthof view. The operator then closing one eye, applies the other t0 theeye-piece, and then traces the outlines', Soc., of the object seenthrough the glass cover or object-glass, using for that purpose a softpencil. This operation is illustrated by Fig.

1. The cover is next to be closed, and the outlines or picturereproduced on the outer side of the glass with a suitable copying-ink,as represented in Fig. 2, from which an impression l canbe taken onpaper. In this manner aperspective landscape or other picture can bequickly produced, or the salient lilies obtained for subsequent fillingout.

This apparatus is convenient for sketchingv purposes, and will save muchtime and labor to artists. It can also be readily used by persons notaccustomed to the work of perspective drawing.

The slide carrying the eye-piece may be tted -for adjustment to and fromthe glass, if desired, and the eye-piece titted with a magnifying-glass.

My apparatus is entirely and exclusively for perspective drawing directfrom nature by tracing on the glass with a soft pencilall the lines onewishes to obtain while the left eye is closed and the right eye fixed tothe eye-piece. By tracing afterward on the outside. of the glass with acopying-liquid all the lines already marked on the inside, and placing adampened drawing-paper over these lines and rubbing slightly with thehand over the back of the paper, a correct perspective sketch fromnature appears on the paper.

VI am aware that I am not the first to construct an apparatus by whichperspective delineations can be taken directly from.nature,

and therefore do not broadly claim such an ap.- paratus.

- Having thus described my invention, I claim as new and desire tosecure by Letters Patent- The combination of hinged frame b, fittedWithglas's a, vertically-adjustable slide c, provided with an eye-piece'or opening, and the supporting box or base A, having socket cl andpivoted brace g, substantially as shown and y described. j

G. M. PERK VAN LITH.

Witnesses:

GEO. D. WALKER, G. SEoewrcK.'

